/*

* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  This class implements an 3GPExt metadata parser 

*

*/

#ifndef C3GPEXTPARSER_H

#define C3GPEXTPARSER_H

// INCLUDES

#include <e32base.h>

#include <mp4lib.h>

#include "MetaDataFieldContainer.h"

#include "MetaDataField.hrh"

// CONSTANTS

_LIT8 (K3GPExtMetaTitleFormat, "%cnam"); 

_LIT8 (K3GPExtMetaArtistFormat, "%cART"); 

_LIT8 (K3GPExtMetaComposerFormat, "%cwrt"); 

_LIT8 (K3GPExtMetaAlbumFormat, "%calb"); 

_LIT8 (K3GPExtMetaCommentFormat, "%ccmt"); 

_LIT8 (K3GPExtMetaCustomGenreFormat, "%cgen");  // mapped to rating

_LIT8 (K3GPExtMetaYearFormat, "%cday"); 

_LIT8 (K3GPExtMetaGenre, "gnre");

_LIT8 (K3GPExtMetaTrack, "trkn"); 

_LIT8 (K3GPExtMetaJpeg, "covr"); 

// CLASS DECLARATION

/**

*  This class implements an 3GPExt metadata parser.

*

*  @lib 3GPExtParser.lib

*  @since 3.0

*/

class C3GPExtParser : public CBase

	{

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @return A pointer to a new instance of parser; NULL if parser is not created.

        */

        IMPORT_C static C3GPExtParser* NewL(MP4Handle& aMP4Handle);

        /**

        * Destructor.

        */

        IMPORT_C virtual ~C3GPExtParser();

        /**

		* Extract meta data boxes from ilst

		* @since 3.0

		* @param aBox wanted metadata box

        * @param aFieldId metadata field in 3GPExtParser

		* @return void

		*/

		IMPORT_C void GetilstBoxesL(const TDesC8& aBox, TMetaDataFieldId aFieldId, HBufC** aBuf);

		/**

		* Extract meta data boxes from ilst

		* 8-bit version to support international languages in string metadata

		* @since 3.1

		* @param aBox wanted metadata box

        * @param aFieldId metadata field in 3GPExtParser

		* @return void

		*/

		IMPORT_C void GetilstBoxesL(const TDesC8& aBox, TMetaDataFieldId aFieldId, HBufC8** aBuf);

		/** 

		* Checks if file has 3GPExt metadata

		*/ 

		IMPORT_C TBool Is3GPExtMetadataL();

 	private:

        /**

        * C++ default constructor.

        */

		C3GPExtParser(MP4Handle& aMP4Handle);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

		void ConstructL();

		/**

        * Maps ID3v1 genre integer to string

        * @param aNum genre integer code

        * @param aGenrePtr string genre value returned

        * @since 3.0

        * @return void

        */

		void MapID3GenreToString(TInt aNum, TDes& aGenrePtr);

		/**

        * Translates error code from MP4 library to one of System Errors.

        * @since 3.0

        * @param aError error code from MP4 library

        * @return System error

        */

		TInt TranslateMP4Err( MP4Err aError );

		/**

        * Parses iList Boxes

        * @since 3.0

        * @param none

        * @return void 

        */

		void ParseIlstBoxesL();

	private:

		// MP4 Handle

		MP4Handle& iMP4Handle;

		// ilst box

		TPtrC8 ilst;

		// 3GPExt metadata exists

		TBool iExists;

		// local chunk

		RChunk iChunk;

		// chuck status

		TInt iChunkStatus;

		TUint32 iTitleOffset;

		TUint32 iTitleSize;

 		TUint32 iArtistOffset;	

 		TUint32 iArtistSize;

 		TUint32 iComposerOffset;

 		TUint32 iComposerSize;

 		TUint32 iAlbumOffset;

 		TUint32 iAlbumSize;

 		TUint32 iCommentOffset;

 		TUint32 iCommentSize;

 		TUint32 iCustomGenreOffset;

 		TUint32 iCustomGenreSize;

 		TUint32 iYearOffset;

 		TUint32 iYearSize;

 		TUint32 iGenreOffset;

 		TUint32 iGenreSize;

 		TUint32 iTrackNumberOffset;

 		TUint32 iTrackNumberSize;

 		TUint32 iCoverOffset;

 		TUint32 iCoverSize;

 	public:

 				// constants

		TBuf8<4> K3GPExtMetaTitle;

		TBuf8<4> K3GPExtMetaArtist;

		TBuf8<4> K3GPExtMetaComposer;

		TBuf8<4> K3GPExtMetaAlbum;

		TBuf8<4> K3GPExtMetaComment;

		TBuf8<4> K3GPExtMetaCustomGenre;

		TBuf8<4> K3GPExtMetaYear;

    };

#endif      // C3GPEXTPARSER_H

// End of File